The thyroid tissue is made up of 2 types of cells: follicular cells and parafollicular cells. Most of the thyroid tissue consists of follicles lined by the follicular cells, which secrete the iodine-containing thyroid hormones.
What types of epithelial tissue is present in the thyroid gland?
Location. Thyroid follicular cells form a simple cuboidal epithelium and are arranged in spherical thyroid follicles surrounding a fluid filled space known as the colloid.
Is thyroid gland a connective tissue?
The thyroid gland is composed of follicles and interfollicular connective tissue. The capsule, classified as loose areolar connective tissue, surrounds the mass of thyroid follicles and sends smaller pieces of connective tissue into the gland to surround the individual thyroid follicles.
Is the thyroid gland made of epithelial tissue?
It is made up of a glycoprotein called thyroglobulin, made by the epithelial cells, which is bound to iodine.
What is the thyroid gland made up of?
The thyroid gland lies in the front of your neck in a position just below your Adam’s apple. It is made up of two lobes – the right lobe and the left lobe, each about the size of a plum cut in half – and these two lobes are joined by a small bridge of thyroid tissue called the isthmus.
Where is epithelial tissue found?
Epithelial tissues are widespread throughout the body. They form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands.
What are the two types of epithelial tissue?
The different types of epithelial tissues are characterized by their cellular shapes and arrangements: squamous, cuboidal, or columnar epithelia. Single cell layers form simple epithelia, whereas stacked cells form stratified epithelia.
Which drug destroy thyroid gland tissue?
Because of this, radioactive iodine (RAI, also called I-131) can be used to treat thyroid cancer. The RAI collects mainly in thyroid cells, where the radiation can destroy the thyroid gland and any other thyroid cells (including cancer cells) that take up iodine, with little effect on the rest of your body.
Where does the thyroid gland lie?
The thyroid is a butterfly-shaped gland that sits low on the front of the neck. Your thyroid lies below your Adam’s apple, along the front of the windpipe. The thyroid has two side lobes, connected by a bridge (isthmus) in the middle. When the thyroid is its normal size, you can’t feel it.
What is normal thyroid gland size?
Normal thyroid lobe dimensions change from birth into adulthood: the length (L or craniocaudal) diameter is 1.8 to 2.0 cm in newborns and 4.0 to 6.0 cm in adults, while the A-P dimension measures 0.8 to 0.9 cm in newborns and 1.3 to 1.8 cm in adults.
What does the thyroid gland secrete?
Topic Overview. The thyroid gland uses iodine from food to make two thyroid hormones: triiodothyronine (T3) and thyroxine (T4). It also stores these thyroid hormones and releases them as they are needed.
Where are thyroid hormones stored?
Storage: thyroid hormones are bound to thyroglobulin for stored in the follicular lumen. Release: thyroid hormones are released into the fenestrated capillary network by thyrocytes in the following steps: Thyrocytes uptake iodinated thyroglobulin via endocytosis.
What are the thyroid follicles?
 The thyroid follicles are the structural and functional units of a thyroid gland. These are spherical, and the wall is made up of a large number of cuboidal cells, the follicular cells. These follicular cells are the derivates of the endoderm and secrete thyroid hormone.
Is a thyroid problem serious?
If your body makes too much thyroid hormone, you can develop a condition called hyperthyroidism. If your body makes too little thyroid hormone, it’s called hypothyroidism. Both conditions are serious and need to be treated by your healthcare provider.
What foods are bad for thyroid?
Which nutrients are harmful?
- soy foods: tofu, tempeh, edamame, etc.
- certain vegetables: cabbage, broccoli, kale, cauliflower, spinach, etc.
- fruits and starchy plants: sweet potatoes, cassava, peaches, strawberries, etc.
- nuts and seeds: millet, pine nuts, peanuts, etc.
How can I check my thyroid at home?
How to Take the Thyroid Neck Check
- Hold a handheld mirror in your hand, focusing on the lower front area of your neck, above the collarbones, and below the voice box (larynx). …
- While focusing on this area in the mirror, tilt your head back.
- Take a drink of water while tilting your head back and swallow.